Means for regulating centrifugal oil-burners.



M. A. FESLER.

MEANS FOR REGULATING OENTRIFUGAL OIL BURNERS. APPLICATION TILED APR. 21, 1913.

Patented Nov. 17, 1914.

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Specification Letters Patent.

Patented Nov. 17, 191%..

Application filed April 21, 1918. Serial No. 762,885.

To all whom it ma concern:

Be it @own that I, Minion A. FESLER, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented new and useful Improvements in Means for Regulatmg Centrifugal Oil-Burners, of which the following is a specification.

en for the purpose of heating a boiler or furnace, there is employed an oil burner supplied with oil by a pump operated by an electric motor, there are certain conditlons, created by use neglect and carelessness on the part o the attendant of the burner, under which the flames of the burner may become extinguished.

The object of the present invention is to provide means for automatically stopping the motor in such cases, thereby fpreventing the continuance of the supply 0 oil to the burner, and the consequent danger of a conflation resulting therefrom.

in the accompanying] drawing, Fi 1 is a side view, partly 'agrammatic, of my improved a paratus; Fig. 2 is a detail lan view of a portion of and apparatus; ig. 3 is an enlarged side view of a portion of said apparatus; Fig. 4 is a broken vertical section through the flue; Fi 5 is a crow section on the line 55 of Fig. 1; Fig. 6 is a side view of a detail.

Referring to the drawing, 1 indicates a furnace having a flue 2 and in which a centrifugal oil burner 3 is rotated b an electric motor a and supplied with oii by a ipe 5 controlled by a valve 10 and lea a. m a pump 6 operated by said motor. Throu h a hole 7 in a side of'said flue is passef an apertured projection 8 from a side oi a housing 9, secured to said due and spaced therefrom by asbestos or other terial l1. Secured by a set-screw 12 in the aperture in said projection is a cylindrical ill. an 0 en end ot a brass or copper tube 1 the c osed other end of which extends through a hole in the opposite side of the flue. Around saidtuhe in said hole w v pac 16, which packing lies also aha-H the inner side oi the due, and hetw said HIE pacln'ng and the end of the projection 8 is an Iron support 17 of stellate form, cut away, as shown at 18, to permit the hot gases to come in contact with the tube 14, but closely surroundin and supported by, the tube between sai cut-away portions. abutting against the closed end of the tube is one end of a carbon rod 19, the other end of which carries a block 21 which can slide in said cylindrical support 13, and abuts against one side of a lever 22, pivoted at its upper end 23 to said support, against the other side of which lever abuts a block 24 pressed by a coiled spring 26 compressed between said block'and a screw plug 27 screwed in said cylindrical support 13. From the lower end of said lever depends an elastic metallic rod 28, the lower end of which carries a contact knob 29. On the bottom of said housing 9 is an insulating block 31,. on the top of which is secured, by a screw 32 and bolt 33, a flange or base, 34 of a wall 36, said bolt passing through an enlarged hole in the bottom of the housing and having secured on its lower end an insulating washer 37 and nuts 38. Said bolt can thus form one terminal, insulated from the housing, but electrically connected to the wall, for an electric circuit, the other terminal of said circuit being electrically connectedwith the housing by a screw 39 screwed into the ousin As s own in Fig. 2, said wall extends in a direction oblique to the plane of vibration of the lever 22, and has a front metallic surface 41 and a rear insulating surface 42. When a fire is started up in the furnace, the tube 14 expands to a much eater degree than the carbon rod 19, an the lever 22 moves to the left under the force of the 26. The knob 29, carried at the lower end of "the rod 28, moving to the left, impinges against the rear insulating side or" the wall, and is deflected rearwardly, moving along said rear side until it esca es past the edge of said wall, and the said cl circuit remains broken between the knob and the Well. Said circuit remains open until the tube 14 contracts, whereupon the knob map 151'! the front metallic side of ectrical ice said wall, and the circuit is closed and re mains closed during the contraction of the tube until the knob passes the right-hand edge of the wall.

To the terminal 39 is secured a wire dd,

passing through an electric bell l and a condenser 46 to reduce the voltage of the current for the coil in the bell 45, and cornmunicating through one side of a double pole main switch 47 with one side 48 of the line wire; and to the other terminal 33 is secured a wire d9 leading to the other side of said switch and connected thereby to the magnet 26, from which a wire 25 leads to a wire 54: which leads to a fuse 56 on one side of a double throw switch '57, through said and switch, then by a wire 58 leading from the same side to the wire dd between the switch 4:7 and the condenser 46, then through the main switch 4-? and by the wire 49 to the other tenal 33. Consequently, when the circuit is closed by the contraction of the tube the electro-maets 53 and 20 are energized. The energization of the magnet 53 attracts an end of a lever 59, pivoted at 61 on a frame 62, the other end of which is pivoted, as shown at 66, to an end of a li 6d, the other end of which is pivoted to one arm of a hell or lever 66, the other arm of which carries a book 67, which engages a pin 66 on a hand lever 69, pivoted at 71 on said double throw switch. Thereby said bell crank lever is rocked d said in 66 is released, and the tch is opens by a spring 72. This switch is inteosed in a circuit through the motor, as follows :-trom one side 46 or the wire, by the wires 4.4:, 58, to one side of e double throw switch 57, through said side and fuse, then b wires 54, 76 to a contact 7d of said switc then b a wire 7 6 to the electric motor and wire 7 to the other contact 8 of said double throw switch, then by a wire 79 to the other fuse 81 thereof, and through the latter side of the switch and by wires 82 and 49 to the other side of the hue. Therefore, when the switch is opened, the circuit through the motor is broken and the motor stops. s of course does not adect the ringin of the hell, which continues for a erio of several utes, during which t e ch 29 is in sliding contact with the metallic surface of the wall 36. The energization of the magnot 20 attracts an a 92 of a lever 93, an

as other a of web is fored'with a-hooh 9d. Thereby said hook is withdrawn from engagement with an arm 95 connected with the valve 16. A weight 96 in said arm 9: thereupon actuates said valve to close the pi, e 6.

%Vhen the circuit through the motor is again closed by moving the double throw switch into the position shown in Fig. l, a shunt circuit is also closed around a solenoid 86 as followsz-trom the wire 54 by a wire 8'? through the solenoid, then by a wire 69 to the wire 82. Thereby the solenoid is ener ized to raise its core 96, the lower end of w ich is connected by a link 91 with the joint 63. Thereby the hell crank lever 66 is restored to its noal position in which the hoolr 67 engages the pin 68.

I claim .l. The combination of a centrifugal oil burner, an electric motor for rotating said burner, a thermostat arranged to be heated by the products of combustion of said burner, and means, arranged to be actuated by the cooling of said theostat, for arresting said motor,

2. The combination of an oil burner, an oil supply 5 an electric motor for operating sai ump, a theostat arranged to heated y of said burner, a device to. control the ctrcuit through the motor, and means for actus stingE1 said device arran ed to be operated by t e coolin of said thermostat.

3. The comination of an oil burner, an oil supply pp, an electric motor for operating said pump, a thermostat arranged to be eated by the products of combustion of said burner, an e ectric circuitarranged to be changed by the cooling of said theostat, electromagnetic mea in said circuit, and a device actuated by the electro-magnetic means to control the circuit through the motor.

t. The combination of an oil burner, an oil supply ump, an electric motor for operatin sai pp, a thermostat arranged to be cated by the roducts of combustion of said burner, an e ectric circuit arranged to be closed by the cooling of said thermostat, electro-maetic means in id circuit, a switch for controlling the circuit through the motor, a ring for opening said switch, a latching evice for maintaining said switch closed, and a device actuated by the electromagnetic means when energized to withdraw said latcg device.

5. The combination of an oil burner, an

oil supply pump, an electric motor for operthe products of combustionating said pump, a thermostat arranged to be heated by the roducts of combustion of said burner. an e ectric circuit arranged to closed by the cooling of said thermostat, electromagnetic means in said circuit, a tch for controg in circuit ouh In testimony whereof I have hereunto set my hand in the presence of two subscribing 1t witnesses.

MILTON A. FESLER.

Witnesses:

FRANCIS M. WVRIGHT, D. B. RICHARDS. 

